Implemented Model and ActiveResource
Merge branch 'master' of github.com:welingtonsampaio/joker-rails

Conflicts:
	spec/javascripts/ajax_spec.coffee
	spec/javascripts/core_spec.coffee
	spec/javascripts/model_spec.coffee
	spec/javascripts/render_spec.coffee
	spec/javascripts/support/user_model.coffee
	vendor/assets/javascripts/joker/Ajax.coffee
	vendor/assets/javascripts/joker/Core.coffee
	vendor/assets/javascripts/joker/Model.coffee
	vendor/assets/javascripts/joker/Render.coffee